Evidence map›Paper›PMID 32196074›Full record

ArticlePathogens and disease2020

The origin of extracellular DNA in bacterial biofilm infections in vivo.

Maria Alhede, Morten Alhede, Klaus Qvortrup, Kasper Nørskov Kragh, Peter Østrup Jensen, Philip Shook Stewart, Thomas Bjarnsholt

Open access · bronzeAbstract read
In one paragraph

Article in Pathogens and disease, 2020. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 43 papers.

0numbers the graph read from it
0cells of the map it votes in
43citing papers in PubMed
8.5field-weighted citation impact, top 2% of its field
1 · What the graph read from it

What it found

Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.

The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.

2 · The registry

The trial behind it

Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.

Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.

3 · Its place in the literature

Who cites it

43 citing papers in PubMed, 70 citations in OpenAlex.

  1. Review
  2. Frontiers in cellular and infection microbiology · 2026
    Article
  3. Article
  4. Review
  5. Management Strategies for Chronic Suppurative Otitis Media and Why They Fail.Journal of the Association for Research in Otolaryngology : JARO · 2025
    Review
  6. Article
  7. Article
  8. Review
  9. Article
  10. Review
  11. What Is a Biofilm? Lessons Learned from Interactions with Immune Cells.International journal of molecular sciences · 2024
    Review
  12. Article
  13. Beyond the double helix: the multifaceted landscape of extracellular DNA inFrontiers in cellular and infection microbiology · 2024
    Review
  14. Mechanisms of antimicrobial resistance in biofilms.npj antimicrobials and resistance · 2024
    Review
  15. Review
  16. Article
  17. Article
  18. The non-attached biofilm aggregate.Communications biology · 2023
    Review
  19. Article
  20. Article
4 · The record

Corrections and comments

PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.

5 · Who and what money

Authors and funding

7 authors at 2 institutions in 2 countries.

Maria AlhedeCosterton Biofilm Center, Department of Immunology and Microbiology, University of Copenhagen, Blegdamsvej 3, DK-2200 Copenhagen N., Denmark.
Morten AlhedeCosterton Biofilm Center, Department of Immunology and Microbiology, University of Copenhagen, Blegdamsvej 3, DK-2200 Copenhagen N., Denmark.
Klaus QvortrupCFIM/Department of Biomedical Sciences, University of Copenhagen, Blegdmasvej 3, DK-2200 Copenhagen N., Denmark.
Kasper Nørskov KraghCosterton Biofilm Center, Department of Immunology and Microbiology, University of Copenhagen, Blegdamsvej 3, DK-2200 Copenhagen N., Denmark.
Peter Østrup JensenCosterton Biofilm Center, Department of Immunology and Microbiology, University of Copenhagen, Blegdamsvej 3, DK-2200 Copenhagen N., Denmark.
Philip Shook StewartCenter for Biofilm Engineering, Montana State University, 366 Barnard Hall, P.O. Box 173980, Bozeman, MT 59717-3980, USA.
Thomas BjarnsholtCosterton Biofilm Center, Department of Immunology and Microbiology, University of Copenhagen, Blegdamsvej 3, DK-2200 Copenhagen N., Denmark.
University of Copenhagen · DKMontana State University · US

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

Extracellular DNA (eDNA) plays an important role in both the aggregation of bacteria and in the interaction of the resulting biofilms with polymorphonuclear leukocytes (PMNs) during an inflammatory response. Here, transmission electron and confocal scanning laser microscopy were used to examine the interaction between biofilms of Pseudomonas aeruginosa and PMNs in a murine implant model and in lung tissue from chronically infected cystic fibrosis patients. PNA FISH, DNA staining, labeling of PMN DNA with a thymidine analogue and immunohistochemistry were applied to localize bacteria, eDNA, PMN-derived eDNA, PMN-derived histone H3 (H3), neutrophil elastase (NE) and citrullinated H3 (citH3). Host-derived eDNA was observed surrounding bacterial biofilms but not within the biofilms. H3 localized to the lining of biofilms while NE was found throughout biofilms. CitH3, a marker for neutrophil extracellular traps (NETs) was detected only sporadically indicating that most host-derived eDNA in vivo was not a result of NETosis. Together these observations show that, in these in vivo biofilm infections with P. aeruginosa, the majority of eDNA is found external to the biofilm and derives from the host.

Indexed as

BiofilmsAnimalsDNA, BacterialExtracellular TrapsHistonesHumansMiceNeutrophilsPseudomonas aeruginosaPseudomonas InfectionsDNA, BacterialHistoneselastasehistoneNETosisneutrophil extracellular trapspolymorphonuclear leukocyte

Identifiers

PMID32196074
PMCPMC7150582
OpenAlexW3011527730

What OpenQuestion holds

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LicenceCC BY-NC
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Registered trials

None linked

Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.